package cn.wuxing.mediation.web.controller.common;

import java.io.*;
import java.util.ArrayList;
import java.util.List;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.wuxing.mediation.common.core.oss.FileVo;
import cn.wuxing.mediation.common.core.oss.OssComponent;
import com.aliyun.oss.OSS;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.InputStreamResource;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import cn.wuxing.mediation.common.constant.Constants;
import cn.wuxing.mediation.common.core.domain.AjaxResult;
import cn.wuxing.mediation.common.utils.StringUtils;
import cn.wuxing.mediation.common.utils.file.FileUploadUtils;
import cn.wuxing.mediation.common.utils.file.FileUtils;
import cn.wuxing.mediation.framework.config.ServerConfig;

/**
 * 通用请求处理
 *
 * @author mediation
 */
@RestController
@RequestMapping("/common")
public class CommonController {
    private static final Logger log = LoggerFactory.getLogger(CommonController.class);

    @Autowired
    private ServerConfig serverConfig;

    @Resource
    private OssComponent ossComponent;

    @Value("${oss.flag}")
    private Boolean flag;

    private static final String FILE_DELIMETER = ",";

    /**
     * 通用下载请求
     *
     * @param fileName 文件名称
     * @param delete   是否删除
     */
    @GetMapping("/download")
    public void fileDownload(String fileName, Boolean delete, HttpServletResponse response, HttpServletRequest request) {
        try {
            if (!FileUtils.checkAllowDownload(fileName)) {
                throw new Exception(StringUtils.format("文件名称({})非法，不允许下载。 ", fileName));
            }
            String realFileName = System.currentTimeMillis() + fileName.substring(fileName.indexOf("_") + 1);
            String filePath = cn.wuxing.mediation.common.config.MediationConfig.getDownloadPath() + fileName;

            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, realFileName);
            FileUtils.writeBytes(filePath, response.getOutputStream());
            if (delete) {
                FileUtils.deleteFile(filePath);
            }
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    /**
     * 通用上传请求（单个）
     */
    @PostMapping("/upload")
    public AjaxResult uploadFile(MultipartFile file) throws Exception {
        AjaxResult ajax = AjaxResult.success();
        if (flag) {
            FileVo fileVo = ossComponent.upload(file);
            if (fileVo == null) {
                return AjaxResult.error("上传失败！");

            }
            ajax.put("url", fileVo.getUrl());
            ajax.put("fileName", fileVo.getFileName());
            ajax.put("newFileName", fileVo.getNewFileName());
            ajax.put("originalFilename", fileVo.getOriginalFilename());
            return ajax;
        } else {
            try {
                // 上传文件路径
                String filePath = cn.wuxing.mediation.common.config.MediationConfig.getUploadPath();
                // 上传并返回新文件名称
                String fileName = FileUploadUtils.upload(filePath, file);
                String url = serverConfig.getUrl() + fileName;
                ajax.put("url", url);
                ajax.put("fileName", fileName);
                ajax.put("newFileName", FileUtils.getName(fileName));
                ajax.put("originalFilename", file.getOriginalFilename());
                return ajax;
            } catch (Exception e) {
                return AjaxResult.error(e.getMessage());
            }
        }
    }

    /**
     * 通用上传请求（多个）
     */
    @PostMapping("/uploads")
    public AjaxResult uploadFiles(List<MultipartFile> files) throws Exception {
        if (flag) {
            List<String> urls = new ArrayList<String>();
            List<String> fileNames = new ArrayList<String>();
            List<String> newFileNames = new ArrayList<String>();
            List<String> originalFilenames = new ArrayList<String>();
            for (MultipartFile file : files) {
                FileVo fileVo = ossComponent.upload(file);
                urls.add(fileVo.getUrl());
                fileNames.add(fileVo.getFileName());
                newFileNames.add(fileVo.getNewFileName());
                originalFilenames.add(file.getOriginalFilename());
            }

            AjaxResult ajax = AjaxResult.success();
            ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
            ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
            ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
            ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
            return ajax;
        } else {
            try {
                // 上传文件路径
                String filePath = cn.wuxing.mediation.common.config.MediationConfig.getUploadPath();
                List<String> urls = new ArrayList<String>();
                List<String> fileNames = new ArrayList<String>();
                List<String> newFileNames = new ArrayList<String>();
                List<String> originalFilenames = new ArrayList<String>();
                for (MultipartFile file : files) {
                    // 上传并返回新文件名称
                    String fileName = FileUploadUtils.upload(filePath, file);
                    String url = serverConfig.getUrl() + fileName;
                    urls.add(url);
                    fileNames.add(fileName);
                    newFileNames.add(FileUtils.getName(fileName));
                    originalFilenames.add(file.getOriginalFilename());
                }
                AjaxResult ajax = AjaxResult.success();
                ajax.put("urls", StringUtils.join(urls, FILE_DELIMETER));
                ajax.put("fileNames", StringUtils.join(fileNames, FILE_DELIMETER));
                ajax.put("newFileNames", StringUtils.join(newFileNames, FILE_DELIMETER));
                ajax.put("originalFilenames", StringUtils.join(originalFilenames, FILE_DELIMETER));
                return ajax;
            } catch (Exception e) {
                return AjaxResult.error(e.getMessage());
            }
        }
    }

    @Value("${oss.BUCKET_NAME}")
    private String bucketName;

    @Value("${oss.ENDPOINT}")
    private String endpoint;

    /**
     * 本地资源通用下载
     */
    @GetMapping("/download/resource")
    public void resourceDownload(String resource, HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        try {
            if (!FileUtils.checkAllowDownload(resource)) {
                throw new Exception(StringUtils.format("资源文件({})非法，不允许下载。 ", resource));
            }
            // 本地资源路径
            String localPath = cn.wuxing.mediation.common.config.MediationConfig.getProfile();
            // 数据库资源地址
            String downloadPath = localPath + StringUtils.substringAfter(resource, Constants.RESOURCE_PREFIX);
            // 下载名称
            String downloadName = StringUtils.substringAfterLast(downloadPath, "/");
            response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
            FileUtils.setAttachmentResponseHeader(response, downloadName);
            FileUtils.writeBytes(downloadPath, response.getOutputStream());
        } catch (Exception e) {
            log.error("下载文件失败", e);
        }
    }

    @GetMapping("/download/file")
    public ResponseEntity<InputStreamResource> download(@RequestParam("url") String url) {
        String fileUrl = url.split(endpoint + "/")[1];
        String tempUrl = fileUrl;
        String filename = tempUrl.split("/")[4];
        OSS ossClient = ossComponent.getOssClient();
        InputStream objectContent = ossClient.getObject(bucketName, fileUrl).getObjectContent();
        InputStreamResource resource = new InputStreamResource(objectContent);
        HttpHeaders headers = new HttpHeaders();
        headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + filename);
        headers.add(HttpHeaders.CONTENT_TYPE, "application/octet-stream"); // 可以根据实际文件类型修改

        return ResponseEntity.ok()
                .headers(headers)
                .body(resource);
    }
}
